Bailroab-cab



2 Sheets-Sheet 2.

H. E. CHAPMAN.

Car Brake.

Paiented Dec. 7, I858 NUPETFRS. PHOTO LTHOGRAFN UNITED STATES PATENTOFFICE.

HENRY E. CHAPMAN, OF ALBANY, NEW YORK.

RAILROAD-CAR BRAKE.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, HENRY E. CHAPMAN, of the city and county of Albanyand State of New York, have invented certain new and useful Improvementsin Railroad-Car Brakes; and I do hereby declare that the following is afull and exact description thereof, reference being had to theaccompanying drawings and to the letters of reference marked thereon.

Of the drawings Figure 1 represents a side elevation of a passenger carwith the brakes not touching the rail; Fig. 2, a longitudinal section ofthe car with the brakes upon the rail; Fig. 3, a plan of the brakes,

trucks, etc., the platform being removed; and Fig. at an end view of thecar upon the track.

In these figures like letters and marks indicate like parts.

My invention has reference to applying the brakes directly to the railinstead of to the wheels or between the periphery or tread of the wheeland the rail.

The platform of the car is designated in the several figures of thedrawings by the letter (A), the trucks on which it rests by (B), thewheels by (C, C,) and the brakes by (D, D). The brakes are representedas being within guides (E, E) the feathers or edges of the brakes ((Z,(Z) fitting into grooves in the guides (F) marks a cross-bar or stayconnecting the brakes, (G, G) levers extending from underneath thecross-bar to shafts (H, H) to which the levers are attached, the shafts(H, H) having vibratory motion, they being supported by the guides (E,E). From the shafts (H, H) other levers (I, I) extend to rods (J, J)connecting levers (I, I,) with and to nuts (K, K) upon the longitudinalshaft (L) extending the entire length of the car. Levers (G, G) and (I,I) are rigidly at- 22,229, dated December '7, 1858.

tached to the shafts (H, H). The nuts (K, K) have screw threads out upontheir interior surfaces, the male part of the threads being upon theshaft (L) and, as is shown by Fig. 2 of the drawings, one of the screwthreads is right and the other left handed. The longitudinal shaft (L)can be freely revolved in the journals (6, e), and it is by beveledwheel (M) geared to the pinion (N) at the lower end of the capstan post(0), of which is the hand wheel. The longitudinal shaft (L) by couplings(P, P,) is connected to other like shafts. It will readily be perceivedthat by rotating the shaft or post (0) in one direc-v tion the meanshere named are so operated as to raise the brakes from the rail, andthat by moving it in the opposite direction the means are so operated asto press the brakes upon the rail.

Instead of the hand-wheel or Windlass or capstan being used to put inmotion the means for actuating the brakes, power derived from the enginemay be substituted, as may also any mechanical or other agents.

Having thus fully set out the character and described the constructionand operation of my invention, what I claim as new and desire to secureby Letters Patent is,

The arrangement of the shaft having upon it the right and left handscrew threads, the right and left hand nuts (K, K,), the rods (J, J) thelevers (I, I,) the shafts (H, H) the levers (G, G,) and the cross-bar(F) in their relation to each other and to the brake as and for thepurposes herein set forth.

This specification signed this 23d day of October 1858.

HENRY E. CHAPMAN.

)Vitnesses MAncUs P. NORTON, T. T. EVERETT.

